KPMG's Football Benchmark study analysed the squads and finances of the respective champions of Europe's top eight leagues.
The Catalans, who signed Brazil playmaker Philippe Coutinho from Liverpool in January 2018 for a club record €160 million (£142 million), have staff costs of €562 million a year.
Along with the arrival of France forward Ousmane Dembele in August 2017 and the renewal of several players' contracts, including talisman Lionel Messi's, their expenditure in this field has increased hugely.
Paris St Germain have the second highest wage bill on the KPMG list at €332 million, an increase of 20 percent.
Expenditure on wages rose across the board with the exception of Premier League champions Manchester City, who saw their spending on wages fall five percent.
The report says Manchester City have the most valuable team, worth a total of €1.182 billion euros, while PSG duo Neymar (€229 million) and Kylian Mbappe (€215 million) are the most valuable players in the world, followed by Messi (€203 million).
(Reporting by Rik Sharma; Editing by Toby Davis)
